var newWindow;
function openWin(url, w, h, caption) {
if( newWindow && !newWindow.closed ) {
newWindow.close();
}
newWindow = window.open(url, 'newWin', 'width='+ w +', height=' + h +', scrollbars=no, resizable=no, toolbars=no, location=no, directories=no, status=no, menubar=no, copyhistory=no');
newWindow.document.write(" ");
newWindow.document.close();
newWindow.focus();
}